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Stein Krogstad

Senior Research Scientist

Stein Krogstad

Senior Research Scientist

Stein Krogstad
Phone: 918 34 023
Department: Mathematics and Cybernetics
Office: Oslo

Publications and responsibilities

Publication
https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1487593

A key part of planning CO2 storage sites is to devise a monitoring strategy with proper modelling support. Herein, we show how a simulation framework that incorporates adjoint-based sensitivities can be combined with time-lapse seismics to update forecast models of the migrating plume, investigate t...

Year 2017
Type Journal publication
Publication
https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1481125

Flow diagnostics refers to a family of numerical methods that within a few seconds can compute visually intuitive quantities illuminating flow patterns and well connections for full 3D reservoir models. The starting point is a flow field, extracted from a previous multiphase simulation or computed b...

Authors Krogstad Stein Lie Knut-Andreas Nilsen Halvor Møll Berg Carl Fredrik Kippe Vegard
Year 2017
Type Journal publication
Publication
https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1408117

We propose to solve a black-oil reservoir optimal control problem with the Direct Multiple Shooting Method (MS). MS allows for parallelization of the simulation time and the handling of output constraints. However, it requires continuity constraints on state variables to couple simulation intervals....

Authors Codas Duarte Andres Foss Bjarne Anton Camponogara Eduardo Krogstad Stein
Year 2016
Type Journal publication
Publication
https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1379912

This work extends the applicability of a class of flow-diagnostic computational tools for interactive visualization and fast simulation approximations to also account for polymer mobility effects. Flow diagnostics, as used here, employ simplifications to the reservoir flow equations to enable comput...

Authors Krogstad Stein Lie Knut-Andreas Nilsen Halvor Møll Berg Carl Fredrik Kippe Vegard
Year 2016
Type Part of a book/report
Publication
https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1281062

Optimizing objectives of long-term reservoir management typically requires a high number of reservoir simulations. Two important remedies to reduce the runtime (and make the optimization problem manageable) are model reduction/upscaling and efficient computation of gradients. Adjoint methods are gen...

Authors Krogstad Stein Raynaud Xavier Nilsen Halvor Møll
Year 2016
Type Journal publication
Publication
https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1265851

MRST is an open-source toolbox developed to support research on computational methods in reservoir engineering and CO2 storage. Primarily, MRST consists of a large collection of extensible and efficient software libraries and data structures that you can use to design your own simulators or computat...

Year 2015
Type Product
Publication
https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1229951

We present MRST–AD, a free, open-source framework written as part of the Matlab Reservoir Simulation Toolbox and designed to provide researchers with the means for rapid prototyping and experimentation for problems in reservoir simulation. The article outlines the design principles and programming t...

Year 2015
Type Part of a book/report